drm/i915: Make object/vma allocation caches global

As our allocations are not device specific, we can move our slab caches
to a global scope.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190228102035.5857-2-chris@chris-wilson.co.uk

1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_object.c b/drivers/gpu/drm/i915/i915_gem_object.c
index aab8cdd80e6d..4aeb8c3b87e4 100644
--- a/drivers/gpu/drm/i915/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/i915_gem_object.c
@@ -25,6 +25,20 @@
 #include "i915_drv.h"
 #include "i915_gem_object.h"
 
+static struct i915_global_object {
+	struct kmem_cache *slab_objects;
+} global;
+
+struct drm_i915_gem_object *i915_gem_object_alloc(void)
+{
+	return kmem_cache_zalloc(global.slab_objects, GFP_KERNEL);
+}
+
+void i915_gem_object_free(struct drm_i915_gem_object *obj)
+{
+	return kmem_cache_free(global.slab_objects, obj);
+}
+
 /**
  * Mark up the object's coherency levels for a given cache_level
  * @obj: #drm_i915_gem_object
@@ -46,3 +60,23 @@ void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
 	obj->cache_dirty =
 		!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE);
 }
+
+int __init i915_global_objects_init(void)
+{
+	global.slab_objects =
+		KMEM_CACHE(drm_i915_gem_object, SLAB_HWCACHE_ALIGN);
+	if (!global.slab_objects)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void i915_global_objects_shrink(void)
+{
+	kmem_cache_shrink(global.slab_objects);
+}
+
+void i915_global_objects_exit(void)
+{
+	kmem_cache_destroy(global.slab_objects);
+}